Sean Murphy

Variable Speed Drives (VSDs), also known as Variable Frequency Drives (VFDs), are essential components in modern industrial automation. By adjusting motor speeds to match actual load demands, VSDs significantly reduce energy consumption and improve process control. However, these benefits come with a hidden technical cost: the generation of electrical harmonics. Understanding what harmonics are and how to suppress them is critical for safeguarding your electrical infrastructure and...

Modern industrial automation relies heavily on Open Platform Communications Unified Architecture (OPC UA). Unlike legacy OPC Classic, which was bound to Microsoft DCOM technology, OPC UA is platform-independent, highly scalable, and secure by design. It serves as the primary bridge connecting Programmable Logic Controllers (PLCs) on the factory floor to Supervisory Control and Data Acquisition (SCADA) systems, and ultimately to cloud-based enterprise platforms. Implementing a robust OPC UA...

EEPROM (Electrically Erasable Programmable Read-Only Memory) is critical in a PLC because it provides reliable, non-volatile storage that permanently retains the control program and machine settings even during a complete power failure. Unlike volatile RAM, EEPROM does not require a backup battery to keep its data safe. It's main function is: Failsafe Program Backup: If the PLC loses power and its main chassis battery fails or drains, the volatile RAM wipes clean. The PLC can automatically...